Method and apparatus for generalized mobility scheduling framework

Abstract

Methods, systems, and devices for wireless communication are described. A wireless device, such as a user equipment (UE), can determine a set of scheduled synchronization signal transmission times. A first subset of the set of scheduled synchronization signal transmission times can be allocated for dynamic measurements. The wireless device can select at least one candidate beam from a set of candidate beams for a dynamic measurement during one of the transmission times in the first subset. The at least one candidate beam can be selected based at least in part on a fairness metric, a signal strength metric, a timing metric, or a combination thereof. The wireless device can perform a measurement procedure on the selected at least one candidate beam and can transmit a measurement report to another wireless device (e.g., a base station) based at least in part on the measurement procedure.

Description

[0001] This application is a divisional application of patent application No. 201980009307.9, filed on January 14, 2019, entitled "Method and Apparatus for a Generalized Mobility Scheduling Framework".

[0002] Cross-references

[0003] This patent application claims the benefit of U.S. Provisional Patent Application No. 62 / 620,335, entitled “Generalized Mobility Scheduling Framework”, filed by Zhu et al. on January 22, 2018, and U.S. Patent Application No. 16 / 246,421, entitled “Generalized Mobility Scheduling Framework”, filed by Zhu et al. on January 11, 2019, each of which is assigned to the assignee of this application. Technical Field

[0004] In summary, the following text deals with wireless communications, and more specifically, with a generalized mobility scheduling framework. Background Technology

[0005] Wireless communication systems are widely deployed to provide various types of communication content, such as voice, video, packet data, messaging, and broadcasting. These systems may be able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of such multiple access systems include fourth-generation (4G) systems (such as Long Term Evolution (LTE) systems, improved LTE (LTE-A) systems, or LTE-A Pro systems) and fifth-generation (5G) systems (which may be referred to as New Radio (NR) systems). These systems may employ technologies such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), or Discrete Fourier Transform Spread Spectrum Orthogonal Frequency Division Multiplexing (DFT-S-OFDM). Wireless multiple access communication systems may include multiple base stations or network access nodes, each supporting communication with multiple communication devices (which may also be referred to as User Equipment (UE)) simultaneously.

[0006] In some wireless communication systems (e.g., millimeter-wave (mmW) systems), a base station and a user equipment (UE) can communicate via one or more directional beams. A transmitter (e.g., a base station) can participate in a beam scanning process to establish an active beam pair with a receiver (e.g., a UE). The active beam pair can include an active transmit beam from the transmitter and a corresponding active receive beam from the receiver. The transmit and receive beams in the active beam pair can be refined, for example, through a beam refinement process. The beam scanning and beam refinement processes can involve transmitting multiple directional beams with different beamforming parameters. The receiver can receive some or all of the beams transmitted with different beamforming parameters and measure one or more characteristics of each beam (e.g., received power, gain, or channel quality indication (CQI) metrics). The receiver can then provide the transmitter with an indication of one or more of the following: the measured characteristics, the one or more beams preferably used to establish the active beam pair, or any combination thereof. However, in some cases, this process can be inefficient and result in significant delays in the beam selection process (e.g., when the receiver selects a beam, beam pair, or beam parameter from multiple different transmit beams, receive beams, cells, component carriers, etc.). Summary of the Invention

[0007] The described technology relates to improved methods, systems, devices, or apparatuses supporting a generalized mobility scheduling framework. In summary, the described technology provides a user equipment (UE) capable of dynamically selecting one or more candidate beams for measurements during synchronization signal transmission times. The UE can determine a set of scheduled synchronization signal transmission times. The UE can select one or more candidate beams from the set of candidate beams for dynamic measurements during a scheduled synchronization signal transmission time within a first subset of the scheduled synchronization signal transmission times. The first subset of the set of scheduled synchronization signal transmission times can be allocated for dynamic measurements. The UE can perform a measurement procedure on the selected candidate beams during a scheduled synchronization signal transmission time within the first subset of the scheduled synchronization signal transmission times. The UE can then send a measurement report corresponding to the measurement procedure.

[0008] A method for wireless communication at a UE is described. The method may include: determining a set of scheduled synchronization signal transmission times; selecting at least one candidate beam from a set of candidate beams for dynamic measurements during a scheduled synchronization signal transmission time in a first subset of the set of scheduled synchronization signal transmission times, wherein the first subset of the set of scheduled synchronization signal transmission times is allocated for dynamic measurements; performing a measurement procedure on the at least one candidate beam during the scheduled synchronization signal transmission time in the first subset of the scheduled synchronization signal transmission times; and transmitting at least one measurement report corresponding to the measurement procedure performed on the at least one candidate beam.

[0009] An apparatus for wireless communication at a UE is described. The apparatus may include: a unit for determining a set of scheduled synchronization signal transmission times; a unit for selecting at least one candidate beam from a set of candidate beams for dynamic measurements during a scheduled synchronization signal transmission time in a first subset of the set of scheduled synchronization signal transmission times, wherein the first subset of the set of scheduled synchronization signal transmission times is allocated for dynamic measurements; a unit for performing a measurement procedure on the at least one candidate beam during the scheduled synchronization signal transmission time in the first subset of the scheduled synchronization signal transmission times; and a unit for transmitting at least one measurement report corresponding to the measurement procedure performed on the at least one candidate beam.

[0010] Another apparatus for wireless communication at a UE is described. The apparatus may include a processor, a memory in electronic communication with the processor, and instructions stored in the memory. The instructions may be operable to cause the processor to: determine a set of scheduled synchronization signal transmission times; select at least one candidate beam from a set of candidate beams for dynamic measurements during a scheduled synchronization signal transmission time in a first subset of the set of scheduled synchronization signal transmission times, wherein the first subset of the set of scheduled synchronization signal transmission times is allocated for dynamic measurements; perform a measurement procedure on the at least one candidate beam during the scheduled synchronization signal transmission time in the first subset of the scheduled synchronization signal transmission times; and send at least one measurement report corresponding to the measurement procedure performed on the at least one candidate beam.

[0011] A non-transitory computer-readable medium for wireless communication at a UE is described. The non-transitory computer-readable medium may include instructions operable to cause a processor to: determine a set of scheduled synchronization signal transmission times by the UE; select at least one candidate beam from a set of candidate beams by the UE for dynamic measurements during a scheduled synchronization signal transmission time in a first subset of the set of scheduled synchronization signal transmission times, wherein the first subset of the set of scheduled synchronization signal transmission times is allocated for dynamic measurements; perform a measurement procedure on the at least one candidate beam during the scheduled synchronization signal transmission time in the first subset of the scheduled synchronization signal transmission times; and transmit at least one measurement report corresponding to the measurement procedure performed on the at least one candidate beam.

[0012] In some examples of the methods, apparatuses, and non-transitory computer-readable media described above, performing the measurement process on the at least one candidate beam during the synchronization signal transmission time of one schedule in a first subset of the scheduled synchronization signal transmission times may further include a process, feature, unit, or instruction for performing the following operations: selecting a UE receive beam for the synchronization signal transmission time of one schedule in the first subset of the scheduled synchronization signal transmission times; and selecting the at least one candidate beam corresponding to the selected UE receive beam from a subset of the candidate beam set.

[0013] In some examples of the methods, apparatuses, and non-transitory computer-readable media described above, the set of scheduled synchronization signal transmission times may be determined at least in part based on the search and measurement period. In some examples of the methods, apparatuses, and non-transitory computer-readable media described above, performing the measurement procedure on the at least one candidate beam during the synchronization signal transmission time of one scheduled event in a first subset of the scheduled synchronization signal transmission times may further include a process, feature, unit, or instruction for: identifying a preferred candidate beam set from the candidate beam set; and performing the measurement procedure at least once for each preferred candidate beam in the preferred candidate beam set during the search and measurement period.

[0014] In some examples of the methods, apparatuses, and non-transitory computer-readable media described above, the at least one candidate beam may be selected from the set of candidate beams based at least in part on a fairness metric, a signal strength metric, a spatial metric, a temporal metric, or a combination thereof. In some examples of the methods, apparatuses, and non-transitory computer-readable media described above, the fairness metric is an example of a weighted fairness metric. In some examples of the methods, apparatuses, and non-transitory computer-readable media described above, the signal strength metric includes signal strength based on historical measurements. In some examples of the methods, apparatuses, and non-transitory computer-readable media described above, the spatial metric includes the spatial distance from the serving beam. In some examples of the methods, apparatuses, and non-transitory computer-readable media described above, the temporal metric includes no-access time.

[0015] Some examples of the methods, apparatuses, and non-transitory computer-readable media described above may also include processes, features, units, or instructions for performing the following: during a second subset of the set of scheduled synchronization signal transmission times, performing a beam scanning process for each UE receive beam in the set of UE receive beams, the second subset being different from a first subset of the set of scheduled synchronization signal transmission times, wherein the second subset of the set of scheduled synchronization signal transmission times may be allocated for static measurements at least in part based on the number of UE receive beams in the set of UE receive beams.

[0016] Some examples of the methods, apparatuses, and non-transitory computer-readable media described above may also include processes, features, units, or instructions for performing additional measurement procedures on at least one beam identified at least partially based on the beam scanning process during a second subset of the set of scheduled synchronization signal transmission times. In some examples of the methods, apparatuses, and non-transitory computer-readable media described above, the candidate beam set may be determined at least partially based on the beam scanning process for each UE-received beam in the UE-received beam set. Attached Figure Description

[0017] Figure 1 and 2 Examples of wireless communication systems are shown in various aspects of this disclosure.

[0018] Figure 3 Examples of time series of synchronization signal transmissions in a wireless communication system are shown in various aspects of this disclosure.

[0019] Figure 4 Examples of wireless devices are shown in accordance with various aspects of this disclosure.

[0020] Figure 5Examples of time series of synchronization signal transmissions in a wireless communication system are shown in various aspects of this disclosure.

[0021] Figure 6 and 7 Block diagrams of wireless devices are shown in accordance with various aspects of this disclosure.

[0022] Figure 8 A block diagram of the communication manager is shown according to various aspects of this disclosure.

[0023] Figure 9 Diagrams of a system including equipment are shown in various aspects of this disclosure.

[0024] Figure 10 A flowchart illustrating the method is shown based on various aspects of this disclosure. Detailed Implementation

[0025] In systems using directional beams, a User Equipment (UE) can use a "cyclic" scan of all beams to determine which beams to use to establish active beam pairs. In such a cyclic scan, the UE discovers beams by measuring all base station beams corresponding to a specific UE beam during scheduled synchronization signal transmission times. The UE can perform this measurement once for each UE-received beam during the measurement period. During other scheduled synchronization signal transmission times within the measurement period, the UE can avoid performing any measurements. Cyclic scanning allows the UE to periodically measure each beam to monitor changes in beam characteristics. However, cyclic scanning may not provide an efficient way to measure available beams. For example, both the currently serving beam and beams that do not provide any communication can be measured at the same rate.

[0026] To improve the efficiency of beam measurement, the UE can divide the scheduled set of synchronization signal transmission times into a first subset and a second subset. The first subset can be allocated for dynamic measurement. Within each synchronization signal transmission time in the first subset, the UE can determine, for example, at least in part, which beams to measure (e.g., whether to measure every beam in the beam set) based on a metric function. For example, the “beam” to be measured may correspond to a specific combination of base station beams, UE beams, component carriers, and cells. In some cases, the UE can determine which beams to measure, at least in part, based on fairness metrics (e.g., weighted fairness metrics), signal strength metrics (e.g., historical signal strength), spatial metrics (e.g., spatial distance to the serving beam), temporal metrics (e.g., no-access time), or combinations thereof. Accordingly, higher-priority beams can be measured more frequently compared to lower-priority beams.

[0027] In some examples, the UE can use a two-step scheduling process to select one or more beams for measurement. The UE can first select a UE receive beam from the available UE receive beams. Then, the UE can select one or more candidate beams corresponding to the UE receive beam for use in measurements during the dynamic transmission time.

[0028] In some examples, the UE can select candidate beams from a set of candidate beams. This set can include all beams discovered during the static measurement transmission time. In some cases, the UE can determine not to perform any measurements during the dynamic transmission time based on a trade-off between performance and power consumption.

[0029] The second subset can be allocated for static measurements. During the static transmission time, the UE can select the UE receive beam and can discover the beam corresponding to the UE receive beam, for example, using a beam scanning procedure (such as cyclic scanning). Each UE receive beam can be scanned once during each measurement period. The beams discovered during the static transmission time can be used to update the set of candidate beams from which the UE selects during the dynamic transmission time.

[0030] By combining static and dynamic measurements, the UE can optimize the trade-offs between performance, mobility, and fairness in beam management. This generalized mobility scheduling framework supports more efficient measurements across multiple beam dimensions (e.g., component carriers, cell, base station beams, and UE beams) in mmW systems. Accordingly, the UE can robustly track the “best” beams for serving the cell (e.g., beams that maximize throughput for the UE, the corresponding base station, or both) by prioritizing measurements of beams more likely to result in better performance. The UE can use an equation balancing performance and fairness to prioritize beams (e.g., pseudo-omnidirectional beams) so that beams are not completely skipped during beam management. In some cases, the UE can fall back to a fixed-period scheduler (e.g., using cyclic scanning) without dynamic scheduling.

[0031] Various aspects of this disclosure are first described in the context of a wireless communication system. Further aspects of this disclosure are illustrated and described with reference to apparatus diagrams, system diagrams, and flowcharts relating to a generalized mobility scheduling framework.

[0032] Figure 1Examples of a wireless communication system 100 are shown according to various aspects of this disclosure. The wireless communication system 100 includes a base station 105, a user interface unit (UE) 115, and a core network 130. In some examples, the wireless communication system 100 may be a Long Term Evolution (LTE) network, an improved LTE (LTE-A) network, an LTE-A Pro network, or a New Radio (NR) network. In some cases, the wireless communication system 100 may support enhanced broadband communication, ultra-reliable (e.g., mission-critical) communication, low-latency communication, or communication with low-cost and low-complexity devices.

[0033] Base station 105 can wirelessly communicate with UE 115 via one or more base station antennas. Base station 105 described herein may include, or may be referred to by those skilled in the art as, a base transceiver, wireless base station, access point, wireless transceiver, Node B, evolved Node B (eNB), next-generation Node B, or gigabit Node B (any of which may be referred to as gNB), home Node B, home evolved Node B, or some other suitable term. Wireless communication system 100 may include different types of base stations 105 (e.g., macro cell base stations or small cell base stations). UE 115 described herein may be able to communicate with various types of base stations 105 and network devices (including macro eNBs, small cell eNBs, gNBs, relay base stations, etc.).

[0034] Each base station 105 may be associated with a specific geographic coverage area 110 in which communication with each UE 115 is supported. Each base station 105 may provide communication coverage to the corresponding geographic coverage area 110 via a communication link 125, and the communication link 125 between the base station 105 and the UE 115 may utilize one or more carriers. The communication link 125 shown in the wireless communication system 100 may include: an uplink transmission from the UE 115 to the base station 105, or a downlink transmission from the base station 105 to the UE 115. The downlink transmission may also be referred to as a forward link transmission, and the uplink transmission may also be referred to as a reverse link transmission.

[0035] The geographic coverage area 110 for base station 105 can be divided into sectors, each sector forming only a portion of the geographic coverage area 110, and each sector can be associated with a cell. For example, each base station 105 can provide communication coverage for macro cells, small cells, hotspots, or other cell types, or various combinations thereof. In some examples, base station 105 can be mobile, and thus provide communication coverage for mobile geographic coverage areas 110. In some examples, different geographic coverage areas 110 associated with different technologies can overlap, and overlapping geographic coverage areas 110 associated with different technologies can be supported by the same base station 105 or different base stations 105. The wireless communication system 100 can include, for example, heterogeneous LTE / LTE-A / LTE-A Pro or NR networks, where different types of base stations 105 provide coverage for individual geographic coverage areas 110.

[0036] The term "cell" refers to a logical communication entity used for communication with base station 105 (e.g., on a carrier), and can be associated with identifiers (e.g., Physical Cell Identifier (PCID), Virtual Cell Identifier (VCID)) used to distinguish neighboring cells operating via the same or different carriers. In some examples, a carrier may support multiple cells, and different cells may be configured according to different protocol types (e.g., Machine-Type Communication (MTC), Narrowband Internet of Things (NB-IoT), Enhanced Mobile Broadband (eMBB), or other protocol types) that can provide access for different types of devices. In some cases, the term "cell" may refer to a portion (e.g., a sector) of the geographical coverage area 110 on which the logical entity operates.

[0037] UE 115 may be distributed throughout the entire wireless communication system 100, and each UE 115 may be stationary or mobile. UE 115 may also be referred to as a mobile device, wireless device, remote device, handheld device, or user equipment, or some other suitable term, wherein "device" may also be referred to as a unit, station, terminal, or client. UE 115 may also be a personal electronic device, such as a cellular phone, personal digital assistant (PDA), tablet computer, laptop computer, or personal computer. In some examples, UE 115 may also refer to a wireless local loop (WLL) station, Internet of Things (IoT) device, Internet of Everything (IoE) device, or MTC device, which may be implemented in various articles of manufacture such as electrical appliances, vehicles, instruments, etc.

[0038] Some UE 115 devices (such as MTC or IoT devices) can be low-cost or low-complexity devices that can provide automated communication between machines (e.g., via machine-to-machine (M2M) communication). M2M communication or MTC can refer to data communication technologies that allow devices to communicate with each other or with base station 105 without human intervention. In some examples, M2M communication or MTC can include communication from devices that integrate sensors or meters to measure or capture information and relay that information to a central server or application that can utilize the information or present it to personnel interacting with the program or application. Some UE 115 devices can be designed to collect information or enable automated machine behavior. Examples of applications for MTC devices include smart metering, inventory monitoring, water level monitoring, equipment monitoring, healthcare monitoring, wildlife monitoring, climate and geological event monitoring, fleet management and tracking, remote security sensing, physical access control, and transaction-based business billing.

[0039] Some UEs 115 can be configured to operate in power-saving modes, such as half-duplex communication (e.g., a mode that supports unidirectional communication via either transmission or reception, rather than simultaneous transmission and reception). In some examples, half-duplex communication may be performed at a reduced peak rate. Other power-saving techniques for UE 115 include entering a power-saving "deep sleep" mode when not engaged in active communication or operating on limited bandwidth (e.g., according to narrowband communication). In some cases, UE 115 may be designed to support critical functions (e.g., mission-critical functions), and the wireless communication system 100 may be configured to provide ultra-reliable communication for these functions.

[0040] In some cases, UE 115 may also be able to communicate directly with other UE 115s (e.g., using peer-to-peer (P2P) or device-to-device (D2D) protocols). One or more UE 115s in a group utilizing D2D communication may be within the geographic coverage area 110 of base station 105. Other UE 115s in such a group may be outside the geographic coverage area 110 of base station 105, or otherwise unable to receive transmissions from base station 105. In some cases, multiple groups of UE 115s communicating via D2D communication may utilize a one-to-many (1:M) system, wherein each UE 115 transmits to every other UE 115 in the group. In some cases, base station 105 facilitates the scheduling of resources for D2D communication. In other cases, D2D communication is performed between UE 115s without involving base station 105.

[0041] Base station 105 can communicate with core network 130 and communicate with each other. For example, base station 105 can interface with core network 130 via backhaul link 132 (e.g., via S1 or another interface). Base station 105 can communicate with each other directly (e.g., directly between base stations 105) or indirectly (e.g., via core network 130) on backhaul link 134 (e.g., via X2 or other interfaces).

[0042] Core network 130 can provide user authentication, access authorization, tracking, Internet (IP) connectivity, and other access, routing, or mobility functions. Core network 130 may be an evolved packet core (EPC), which may include at least one mobility management entity (MME), at least one serving gateway (S-GW), and at least one packet data network (PDN) gateway (P-GW). The MME can manage non-access stratum (e.g., control plane) functions, such as mobility, authentication, and bearer management for UE 115 served by base station 105 associated with the EPC. User IP packets can be transmitted via the S-GW, which itself may be connected to the P-GW. The P-GW can provide IP address allocation and other functions. The P-GW may be connected to network operator IP services. Operator IP services may include access to the Internet, intranets, IP Multimedia Subsystem (IMS), or packet-switched (PS) streaming services.

[0043] At least some of the network devices (such as base station 105) may include sub-components such as access network entities, which may be examples of access node controllers (ANCs). Each access network entity may communicate with UE 115 through multiple other access network transport entities (which may be referred to as radio headends, smart radio headends, or transmit / receive points (TRPs)). In some configurations, the various functions of each access network entity or base station 105 may be distributed across various network devices (e.g., radio headends and access network controllers) or incorporated into a single network device (e.g., base station 105).

[0044] Wireless communication system 100 can operate using one or more frequency bands (typically in the range of 300 MHz to 300 GHz). The region from 300 MHz to 3 GHz is often referred to as the Ultra High Frequency (UHF) region or decimeter band because the wavelength range approximates one decimeter to one meter in length. UHF waves may be blocked or redirected by buildings and environmental features. However, the waves can be sufficient to penetrate structures for macrocell service to UE 115 located indoors. Compared to the transmission of smaller frequencies and longer waves using the lower frequencies (HF) or very high frequencies (VHF) portions of the spectrum below 300 MHz, UHF wave transmission can be associated with smaller antennas and shorter distances (e.g., less than 100 km).

[0045] The wireless communication system 100 can also operate in the ultra-high frequency (SHF) region using a frequency band from 3 GHz to 30 GHz (also known as the centimeter band). The SHF region includes frequency bands such as the 5 GHz industrial, scientific, and medical (ISM) band, which can be used opportunistically by devices capable of tolerating interference from other users.

[0046] The wireless communication system 100 can also operate in the extremely high frequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz) (also referred to as the millimeter band). In some examples, the wireless communication system 100 can support millimeter-wave (mmW) communication between the UE 115 and the base station 105, and the EHF antennas of the corresponding device can be even smaller and more closely spaced compared to UHF antennas. In some cases, this can facilitate the use of antenna arrays within the UE 115. However, the propagation of EHF transmissions may be subject to even greater atmospheric attenuation and shorter distances compared to SHF or UHF transmissions. The techniques disclosed herein can be employed across transmissions using one or more different frequency regions, and the designated use of frequency bands across these frequency regions can vary depending on the country or regulatory body.

[0047] In some cases, wireless communication system 100 may utilize both licensed and unlicensed radio frequency spectrum bands. For example, wireless communication system 100 may employ Licensed Assisted Access (LAA), LTE Unlicensed (LTE-U) radio access technology, or NR technology in unlicensed frequency bands (such as the 5 GHz ISM band). When operating in unlicensed radio frequency spectrum bands, wireless devices (such as base station 105 and UE 115) may employ a Listen-Before-Speak (LBT) procedure before transmitting data to ensure that the frequency channel is idle. In some cases, operation in unlicensed frequency bands may be based on carrier aggregation (CA) configurations that combine component carriers (CCs) operating in licensed frequency bands (e.g., LAA). Operation in unlicensed spectrum may include downlink transmission, uplink transmission, peer-to-peer transmission, or a combination of these. Duplexing in unlicensed spectrum may be based on Frequency Division Duplex (FDD), Time Division Duplex (TDD), or a combination of both.

[0048] In some examples, base station 105 or UE 115 may be equipped with multiple antennas, which can be used to employ techniques such as transmit diversity, receive diversity, multiple-input multiple-output (MIMO) communication, or beamforming. For example, wireless communication system 100 may use a transmission scheme between a transmitting device (e.g., base station 105) and a receiving device (e.g., UE 115), wherein the transmitting device is equipped with multiple antennas, and the receiving device is equipped with one or more antennas. MIMO communication may employ multipath signal propagation to improve spectral efficiency by transmitting or receiving multiple signals via different spatial layers (this may be referred to as spatial multiplexing). For example, the transmitting device may transmit multiple signals via different antennas or different combinations of antennas. Similarly, the receiving device may receive multiple signals via different antennas or different combinations of antennas. Each of the multiple signals may be referred to as a separate spatial stream and may carry bits associated with the same data stream (e.g., the same codeword) or different data streams. Different spatial layers may be associated with different antenna ports used for channel measurement and reporting. MIMO technology includes single-user MIMO (SU-MIMO) (where multiple spatial layers are sent to the same receiving device) and multi-user MIMO (MU-MIMO) (where multiple spatial layers are sent to multiple devices).

[0049] Beamforming (which may also be referred to as spatial filtering, directional transmission, or directional reception) is a signal processing technique used at a transmitting or receiving device (e.g., base station 105 or UE 115) to form or control an antenna beam (e.g., a transmit beam or a receive beam) along a spatial path between the transmitting and receiving devices. Beamforming can be achieved by combining signals transmitted via antenna elements of an antenna array such that signals propagating in a specific orientation relative to the antenna array experience constructive interference, while other signals experience destructive interference. Adjustments to the signals transmitted via the antenna elements can include applying certain amplitude and phase offsets to the signals carried by each antenna element in the antenna array associated with the transmitting or receiving device. The adjustments associated with each antenna element can be defined by a set of beamforming weights associated with a specific orientation (e.g., relative to the antenna array of the transmitting or receiving device, or relative to some other orientation).

[0050] In one example, base station 105 may use multiple antennas or antenna arrays to perform beamforming operations for directional communication with UE 115. For example, base station 105 may transmit signals (e.g., synchronization signals, reference signals, beam selection signals, or other control signals) multiple times in different directions, which may include signals transmitted according to different sets of beamforming weights associated with different transmission directions. Transmissions in different beam directions can be used (e.g., by base station 105 or receiving device (such as UE 115)) to identify the beam direction for subsequent transmissions and / or receptions performed by base station 105. Base station 105 may transmit signals (e.g., data signals associated with a specific receiving device) in a single beam direction (e.g., the direction associated with the receiving device (such as UE 115)). In some examples, the beam direction associated with transmissions along a single beam direction may be determined at least in part based on signals transmitted in different beam directions. For example, UE 115 may receive one or more signals transmitted by base station 105 in different directions, and UE 115 may report to base station 105 an indication of the received signal with the highest signal quality or otherwise acceptable signal quality. Although these techniques are described with reference to signals transmitted by base station 105 in one or more directions, UE 115 may employ similar techniques to transmit signals multiple times in different directions (e.g., to identify beam directions for subsequent transmissions or receptions by UE 115) or to transmit signals in a single direction (e.g., to transmit data to a receiving device).

[0051] When receiving various signals (such as synchronization signals, reference signals, beam selection signals, or other control signals) from base station 105, a receiving device (e.g., UE 115, which may be an example of an mmW receiving device) can attempt multiple receive beams. For example, the receiving device can attempt multiple receive directions by receiving via different antenna subarrays, by processing the received signals according to different antenna subarrays, by receiving according to different sets of receive beamforming weights applied to the signals received at multiple antenna elements of the antenna array, or by processing the received signals according to different sets of receive beamforming weights applied to the signals received at multiple antenna elements of the antenna array (each of which can be referred to as "listening" according to different receive beams or receive directions). In some examples, the receiving device can use a single receive beam to receive along a single beam direction (e.g., when receiving data signals). A single receive beam can be aligned on a beam orientation determined at least in part based on listening to different receive beam orientations (e.g., at least in part based on beam orientations determined to have the highest signal strength, highest signal-to-noise ratio, or otherwise acceptable signal quality based on listening to multiple beam orientations).

[0052] In some cases, the antennas of base station 105 or UE 115 may be located within one or more antenna arrays that can support MIMO operation or transmit or receive beamforming. For example, one or more base station antennas or antenna arrays may be co-located at an antenna assembly, such as an antenna tower. In some cases, the antennas or antenna arrays associated with base station 105 may be located in different geographical locations. Base station 105 may have antenna arrays with multiple rows and columns of antenna ports that base station 105 can use to support beamforming for communication with UE 115. Similarly, UE 115 may have one or more antenna arrays that can support various MIMO or beamforming operations.

[0053] In some cases, the wireless communication system 100 may be a packet-based network operating according to a layered protocol stack. In the user plane, communication at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP-based. In some cases, the Radio Link Control (RLC) layer may perform packet fragmentation and reassembly for communication on logical channels. The Media Access Control (MAC) layer may perform priority handling and multiplexing of logical channels to transport channels. The MAC layer may also use Hybrid Automatic Repeat Request (HARQ) to provide retransmissions at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer may provide the establishment, configuration, and maintenance of RRC connections (which support radio bearers for user plane data) between the UE 115 and the base station 105 or core network 130. At the physical (PHY) layer, transport channels may be mapped to physical channels.

[0054] In some cases, UE 115 and base station 105 can support data retransmission to increase the likelihood of successful data reception. HARQ feedback is a technique to increase the likelihood of correct data reception on communication link 125. HARQ can include a combination of error detection (e.g., using Cyclic Redundancy Check (CRC)), forward error correction (FEC), and retransmission (e.g., Automatic Repeat Request (ARQ)). HARQ can improve throughput at the MAC layer under poor radio conditions (e.g., signal and noise conditions). In some cases, the radio device can support same-slot HARQ feedback, where the device can provide HARQ feedback for data received in a previous symbol within a specific time slot. In other cases, the device can provide HARQ feedback in subsequent time slots or according to some other time interval.

[0055] It can be based on the basic unit of time (which can, for example, refer to T). s The time interval in LTE or NR is represented as a multiple of a sampling period of 1 / 30,720,000 seconds. The time interval of communication resources can be organized based on radio frames, each with a duration of 10 milliseconds (ms), where the frame period can be expressed as T. f =307,200T sRadio frames can be identified by System Frame Numbers (SFNs) ranging from 0 to 1023. Each frame may include 10 subframes numbered from 0 to 9, and each subframe may have a duration of 1 ms. Subframes may be further divided into two time slots, each with a duration of 0.5 ms, and each time slot may contain 6 or 7 modulation symbol periods (e.g., depending on the length of the cyclic prefix added before each symbol period). Excluding the cyclic prefix, each symbol period may contain 2048 sampling periods. In some cases, a subframe may be the minimum scheduling unit of the wireless communication system 100, and may be referred to as a Transmission Time Interval (TTI). In other cases, the minimum scheduling unit of the wireless communication system 100 may be shorter than a subframe or may be dynamically selected (e.g., in a burst of shortened TTIs (sTTIs) or in selected component carriers using sTTIs).

[0056] In some wireless communication systems, time slots can be further divided into multiple micro-time slots containing one or more symbols. In some instances, the symbol or micro-time slot of a micro-time slot can be the smallest scheduling unit. For example, the duration of each symbol can vary depending on the subcarrier spacing or the frequency band of operation. Furthermore, some wireless communication systems can implement time slot aggregation, where multiple time slots or micro-time slots are aggregated together for communication between UE 115 and base station 105.

[0057] The term "carrier" refers to a set of radio frequency spectrum resources having a defined physical layer structure for supporting communication on communication link 125. For example, a carrier of communication link 125 may include a portion of the radio frequency spectrum band that operates according to physical layer channels for a given radio access technology. Each physical layer channel may carry user data, control information, or other signaling. Carriers may be associated with predefined frequency channels (e.g., Evolved Universal Terrestrial Radio Access (E-UTRA) Absolute Radio Channel Number (EARFCN)) and may be positioned according to a channel grid for discovery by UE 115. Carriers may be downlink or uplink (e.g., in FDD mode), or may be configured to carry both downlink and uplink communications (e.g., in TDD mode). In some examples, the signal waveform transmitted on a carrier may consist of multiple subcarriers (e.g., using multicarrier modulation (MCM) techniques such as Orthogonal Frequency Division Multiplexing (OFDM) or Discrete Fourier Transform Spread Spectrum OFDM (DFT-s-OFDM).

[0058] The carrier organization structure can vary depending on the radio access technology (e.g., LTE, LTE-A, LTE-A Pro, NR, etc.). For example, communication on a carrier can be organized according to a Time Interval (TTI) or time slot, each of which can include user data and control information or signaling to support the decoding of the user data. A carrier can also include dedicated acquisition signaling (e.g., synchronization signals or system information) and control signaling to coordinate operations on the carrier. In some examples (e.g., in a carrier aggregation configuration), a carrier can also have acquisition signaling or control signaling to coordinate operations on other carriers.

[0059] Physical channels can be multiplexed on a carrier using various techniques. For example, time division multiplexing (TDM), frequency division multiplexing (FDM), or hybrid TDM-FDM techniques can be used to multiplex physical control channels and physical data channels on a downlink carrier. In some examples, control information transmitted in the physical control channel can be distributed in a concatenated manner between different control regions (e.g., between a common control region or common search space and one or more UE-specific control regions or UE-specific search spaces).

[0060] A carrier can be associated with a specific bandwidth of the radio frequency spectrum, and in some examples, the carrier bandwidth can be referred to as the carrier or the “system bandwidth” of the wireless communication system 100. For example, the carrier bandwidth can be one of a plurality of predetermined bandwidths for a carrier of a particular wireless access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz). In some examples, each served UE 115 can be configured to operate on a portion or all of the carrier bandwidth. In other examples, some UEs 115 can be configured to operate using a narrowband protocol type associated with a predefined portion or range within the carrier (e.g., a set of subcarriers or resource blocks (RBs)) (e.g., “in-band” deployment of a narrowband protocol type).

[0061] In systems employing MCM technology, a resource element can consist of one symbol period (e.g., the duration of a modulation symbol) and a subcarrier, where the symbol period and subcarrier spacing are inversely proportional. The number of bits carried by each resource element can depend on the modulation scheme (e.g., the order of the modulation scheme). Therefore, the more resource elements UE 115 receives and the higher the order of the modulation scheme, the higher the data rate can be for UE 115. In MIMO systems, wireless communication resources can refer to a combination of radio frequency spectrum resources, temporal resources, and spatial resources (e.g., spatial layers), and the use of multiple spatial layers can further increase the data rate used for communication with UE 115.

[0062] The devices of the wireless communication system 100 (e.g., base station 105 or UE 115) may have a hardware configuration that supports communication on a specific carrier bandwidth, or may be configurable to support communication on one of a set of carrier bandwidths. In some examples, the wireless communication system 100 may include base station 105 and / or UE, which may support simultaneous communication via carriers associated with more than one different carrier bandwidth.

[0063] The wireless communication system 100 can support communication with the UE 115 on multiple cells or carriers (this can be referred to as CA or multi-carrier operation). Depending on the CA configuration, the UE 115 can be configured with multiple downlink component carriers and one or more uplink component carriers. CA can be used in conjunction with both FDD and TDD component carriers.

[0064] In some cases, the wireless communication system 100 may utilize enhanced component carriers (eCC). eCC can be characterized by one or more features including: a wider carrier or frequency channel bandwidth, a shorter symbol duration, a shorter TTI duration, or a modified control channel configuration. In some cases, eCC may be associated with carrier aggregation configurations or dual connectivity configurations (e.g., when multiple serving cells have suboptimal or non-ideal backhaul links). eCC can also be configured for use in unlicensed spectrum or shared spectrum (e.g., where more than one operator is permitted to use the spectrum). eCC characterized by a wide carrier bandwidth may include one or more segments that can be utilized by a UE 115 that cannot monitor the entire carrier bandwidth or is otherwise configured to use a limited carrier bandwidth (e.g., to save power).

[0065] In some cases, eCC can utilize a different symbol duration than other component carriers, which may include using a reduced symbol duration compared to other component carriers. A shorter symbol duration can be associated with increased spacing between adjacent subcarriers. Devices utilizing eCC (such as UE 115 or base station 105) can transmit wideband signals (e.g., based on frequency channels or carrier bandwidths of 20, 40, 60, 80 MHz, etc.) with a reduced symbol duration (e.g., 16.67 microseconds). The TTI in eCC can consist of one or more symbol periods. In some cases, the TTI duration (i.e., the number of symbol periods in the TTI) can be variable.

[0066] Wireless communication systems (such as NR systems) can utilize any combination of licensed, shared, and unlicensed spectrum bands. The flexibility in eCC symbol duration and subcarrier spacing allows for the use of eCC across multiple spectrums. In some examples, NR spectrum sharing can improve spectrum utilization and efficiency, especially through dynamic vertical (e.g., across frequency) and horizontal (e.g., across time) sharing of resources.

[0067] UE 115 may include a communication manager 101, which can dynamically select candidate beams for measurements during dynamic transmission times. The communication manager 101 can determine a set of scheduled synchronization signal transmission times. A first subset of the set of scheduled synchronization signal transmission times can be allocated for dynamic measurements, and a second subset of the set of scheduled synchronization signal transmission times can be allocated for static measurements.

[0068] During each dynamic transmission period in the dynamic transmission time, the communication manager 101 can select one or more candidate beams for dynamic measurements. The communication manager 101 can select one or more candidate beams based at least in part on a metric function. One or more candidate beams can be selected from a set of candidate beams. In some examples, the communication manager 101 can first select a UE receive beam from available UE receive beams, and then select one or more candidate beams corresponding to the selected UE receive beam for measurements (e.g., a beam transmitted by the base station carrying a signal that can be received on the UE receive beam).

[0069] The communication manager 101 may select one or more candidate beams based at least in part on a fairness metric, a signal strength metric, a spatial metric, a temporal metric, or a combination thereof. In some examples, the communication manager 101 may select one or more candidate beams based at least in part on a weighted fairness metric. In some examples, the communication manager 101 may select one or more candidates based at least in part on historical signal strength measurements. In some examples, the communication manager 101 may select one or more candidates based at least in part on the spatial distance from the currently serving beam. In some examples, the communication manager 101 may select one or more candidates based at least in part on time without access.

[0070] In some examples, the communication manager 101 can identify a priority candidate beam set. The priority candidate beam set can be a subset of the candidate beam set. The priority candidate beam set can include all beams that satisfy one or more priority criteria. For example, the priority candidate beam set can include all currently serving beams. As another example, the priority candidate beam set can include all beams with signal strengths above a signal strength threshold. The communication manager 101 can select candidate beams for dynamic measurement, such that each beam in the priority beam set can be measured during a search and measurement period. The search and measurement period can be based at least in part on the number of candidate beams, hardware measurement capability limitations, or a combination thereof.

[0071] During each static transmission period in a static transmission time, the communication manager 101 may perform a beam scanning process to discover beams that can be used for communication with the base station. The communication manager 101 may update the candidate beam set based on the beams discovered during the beam scanning process. In some examples, the communication manager 101 may, for example, measure one or more beams among those discovered during the static transmission time based at least in part on hardware measurement capabilities.

[0072] Figure 2 Examples of a wireless communication system 200 are shown according to various aspects of this disclosure. In some examples, the wireless communication system 200 may implement aspects of the wireless communication system 100.

[0073] The wireless communication system 200 may include a base station 205 and a user interface unit (UE) 210. The base station 205 and UE 210 may be respectively as shown in the reference... Figure 1 Examples of various aspects of the described base station 105 and UE 115. Base station 205 and UE 210 can operate in a frequency range associated with beamforming transmission between base station 205 and UE 210. For example, base station 205 and UE 210 can operate using a mmW frequency range. Therefore, signal processing techniques such as beamforming can be used to coherently combine energy and overcome path loss. Base station 205 can communicate (transmit and / or receive) using base station beam 215, and UE 210 can communicate (transmit and / or receive) using UE beam 220.

[0074] In the wireless communication system 200, base station 205 can perform a beam scanning procedure to allow UE 210 to discover beams that can be used for communication (i.e., a combination of base station beam 215 and UE beam 220). In some cases, the beams used for communication may be referred to as a beam pair or a transmit / receive beam pair. In some cases, base station 205 may perform the beam scanning procedure at regular intervals (e.g., every 20 milliseconds). The time period during which the beam scanning procedure is performed may be referred to as the scheduled synchronization signal transmission time.

[0075] During each scheduled synchronization signal transmission period, base station 205 may transmit synchronization signals on different base station beams 215 in sequences along different directions (e.g., using the same beamwidth or different beamwidths). In some examples, each scheduled synchronization signal transmission period may be a time slot. Each scheduled synchronization signal transmission period may include a Synchronization Signal Burst Set (SSBS). In one example, an SSBS may include up to 64 Synchronization Signal Blocks (SSBs). In other examples, an SSBS may include up to 16 SSBs, 32 SSBs, or some other number of SSBs supported by or configured for use by the wireless communication system 200. In some examples, base station 205 may transmit synchronization signals on each base station beam in base station beams 215 during each scheduled synchronization signal transmission period. For example, each base station beam 215 may correspond to a different SSB in an SSBS within a scheduled synchronization signal transmission period.

[0076] The scheduled synchronization signal transmission time can be allocated for different purposes. For example, a first subset of the scheduled synchronization signal transmission time can be allocated for dynamic measurements. During dynamic measurements, the UE 210 can measure only a subset of all base station beams 215. Beams can be selected from a set of candidate beams.

[0077] In some examples, UE 210 can select one of the UE beams 220. Based on the selected UE receive beam 220, the UE can select one or more beams (corresponding to using the selected UE receive beam 220 to measure one or more base station beams 215 in the base station beams 215). UE 210 can then perform measurements during the SSB corresponding to the selected beam, and can avoid performing measurements during other SSBs.

[0078] UE 210 can select beams at least in part based on a fairness metric. For example, the fairness metric could be a weighted fairness metric. According to the weighted fairness metric, it can be guaranteed that all beams are accessed (i.e., measured) at least once within a given time period. However, each beam in the beam can have a different priority. Based on the priority, a beam can be measured once or multiple times during that time period. For example, if beam A has a weight of 1 and beam B has a weight of 2, beam A can be measured once during that time period, while beam B can be measured twice. This time period can span one or more scheduled synchronization signal transmission times (e.g., one or more symbols, time slots, subframes, etc.).

[0079] UE 210 may select beams at least in part based on signal strength metrics. For example, UE 210 may store information about historical signal strength measurements. UE 210 may prioritize stronger beams based on historical strength measurements, making these beams statistically more likely to be measured in a given synchronization signal transmission time. In some examples, UE 210 may consider historical signal strength measurements from a defined time period (e.g., the last n synchronization signal transmission times).

[0080] UE 210 may select a beam at least partially based on spatial metrics. For example, UE 210 may give higher priority to beams that are spatially adjacent to the currently serving beam. In some examples, UE 210 may select a beam at least partially based on the spatial distance between the selected beam and the currently serving beam.

[0081] UE 210 can select beams at least in part based on timing metrics. For example, UE 210 can give higher priority to beams with longer no-access times, i.e., the beams that have elapsed the longest without being measured by UE 210.

[0082] In some examples, UE 210 may select a beam at least partially based on a set of preferred candidate beams. For example, UE 210 may identify a preferred beam set at least partially based on a set of priority criteria. Priority criteria may include, for example, a signal strength criterion, such that all beams with signal strength greater than a signal strength threshold (e.g., a predetermined, semi-static, or dynamic signal strength threshold) may be included in the preferred beam set. Priority criteria may also include, for example, a current serving beam criterion, such that all currently serving beams may be included in the preferred beam set.

[0083] UE 210 can select beams for dynamic measurements such that all beams in the preferred candidate beam set are measured at least once during the search and measurement period. The search and measurement period can be determined at least in part based on the number of UE-received beams 220, the number of base station beams 215, the number of candidate beams in the candidate beam set, hardware measurement capabilities, or some combination of these or similar criteria. UE 210 can use any combination of the techniques described herein to select beams.

[0084] In some examples, UE 210 may not select the beam used for dynamic measurements during the scheduled synchronization signal transmission time. Such scenarios may be due to the need to balance performance and battery consumption.

[0085] A second subset of the scheduled synchronization signal transmission time can be allocated for static measurements. During static measurements, UE 210 can perform a beam scanning procedure to discover new base station beams 215 from different cells spanning different component carriers. In some examples, UE 210 can measure some or all of the discovered base station beams 215 based on, for example, the hardware measurement capabilities of UE 210. The beams discovered during the beam scanning procedure can be used to create or update a list of candidate beams that can be selected during dynamic measurements.

[0086] UE 210 may report information about the selected beam to base station 205 in uplink transmission 225. Uplink transmission 225 may include a measurement report corresponding to the measurement procedures for one or more selected beams. The measurement report may include any number of parameters or values ​​determined for one or more selected beams. In some cases, based on the measurement report, base station 205 and UE 210 may select a beam for communication (e.g., downlink transmitting base station beam 215 and downlink receiving UE beam 220, uplink transmitting UE beam 220 and uplink receiving base station beam 215, or some combination thereof), and may use the selected serving beam to perform additional communication. Additional scheduled synchronization signal transmission times may be used to update or refine the selected beam to maintain reliable communication between base station 205 and UE 210.

[0087] Figure 3 Examples of a scheduling synchronization signal transmission time sequence 300 in a wireless communication system are shown according to various aspects of this disclosure. In some examples, the wireless communication system may implement aspects of wireless communication system 100 or 200.

[0088] Base station (such as reference) Figure 2 The described base station 205 can perform a beam scanning process at regular intervals (e.g., every 20 milliseconds). The UE (such as reference UE) Figure 2 The described UE 210 can determine a set of synchronization signal transmission times. In some examples, the set of synchronization signal transmission times may be determined at least in part based on a search and measurement period, which may be determined at least in part based on the number of candidate beams, hardware measurement capabilities, or a combination thereof. In the scheduled synchronization signal transmission time sequence 300, the search and measurement period (and the set of synchronization signal transmission times) comprises sixteen synchronization signal transmission times, each separated by 20 milliseconds.

[0089] The sixteen synchronization signal transmission times can be divided into a first subset and a second subset. The first subset of synchronization signal transmission times can be allocated for dynamic measurements, and the second subset can be allocated for static measurements. In some examples, the first and second subsets can be defined and allocated according to technical standards. In some other examples, the first and second subsets can be defined and allocated at least in part based on signaling from the base station. In some still examples, the first and second subsets can be defined and allocated by the UE.

[0090] The scheduled synchronization signal transmission time sequence 300 includes a first sequence 305 and a second sequence 310. In the first sequence 305, a first subset includes dynamic transmission time 315, and a second subset includes static transmission time 320. In the second sequence, a first subset includes dynamic transmission time 325, and a second subset includes static transmission time 330.

[0091] In the first sequence 305, the initial synchronization signal transmission time can be allocated for static scheduling based at least in part on the number of available UE receive beams. For example, when the UE has four UE receive beams, the first four synchronization signal transmission times can be allocated for static scheduling, as shown in the first sequence 305. Each static transmission time 320 in the static transmission time 320 can be used to perform a search and measurement (beam discovery) process to identify candidate beams. For example, the UE can perform a first search and measurement (S / M-1) process in the first static transmission time 320-a using a first UE receive beam, a second search and measurement (S / M-2) process in the second static transmission time 320-b using a second UE receive beam, a third search and measurement (S / M-3) process in the third static transmission time 320-c using a third UE receive beam, and a fourth search and measurement (S / M-4) process in the fourth static transmission time 320-d using a fourth UE receive beam. During the search process, the UE can discover new base station beams from different cells spanning different component carriers (e.g., base station beams not previously identified by the UE). During the measurement process, the UE can measure some or all of the discovered beams (e.g., based on the UE's processing capabilities). Before the start of the fifth synchronization signal transmission time, the UE can compile a candidate beam set based on the beams discovered during the four search and measurement processes.

[0092] In some examples, the UE can also measure one or more of the discovered beams during the search and measurement process. The UE can determine whether to measure the discovered beams or how many of the discovered beams to measure, based at least in part on hardware measurement capabilities.

[0093] In the first sequence 305, the remaining synchronization signal transmission time in each search and measurement period can be used for dynamic measurement. During each dynamic transmission time 315, the UE can select one or more beams for measurement, or it can determine that no measurement is performed during the dynamic transmission time 315. The UE can select one or more beams from the set of candidate beams identified during the static transmission time 320. The UE can select beams at least in part based on a metric function and / or selection algorithm. In some cases, beam selection may additionally include dynamically selecting one or more component carriers, cells, or both for measurement. For example, the number of component carriers, cells, or both that can be measured by the UE per scheduling opportunity may be limited (e.g., fixed within an SSBS). Accordingly, dynamically selecting the beam for measurement may involve the UE dynamically selecting the base station beam, UE beam, cell, and component carriers for the selected beam.

[0094] In some examples, the UE can use a two-step scheduling to select a beam for each dynamic transmission time. The UE can first select one or more UE receive beams from the available UE receive beams (e.g., one of the first through fourth UE receive beams used during static transmission time 320). The UE can then select one or more beams corresponding to the selected UE receive beam. For example, the UE can identify fifteen beams during a first static transmission time 320-a, during which the search and measurement process is performed using the first UE receive beam. Accordingly, each of the fifteen beams represents a combination of the first UE receive beam and a base station transmit beam. During one of the dynamic transmission times 315, the UE can select the first UE receive beam. The UE can then select one or more of the fifteen beams for measurements during the dynamic transmission time 315 (e.g., based on a metric function and / or selection algorithm).

[0095] In some examples, the UE may select candidate beams for measurement based at least in part on fairness metrics, signal strength metrics, spatial metrics, temporal metrics, or combinations thereof. For example, the UE may select candidate beams at least in part on a weighted fairness metric. In another example, the UE may store information about historical signal strength measurements and may select candidate beams at least in part on historical signal strength measurements (e.g., signal strength measurements over the most recent n transmission times). In yet another example, the UE may select beams at least in part on the spatial distance between the beam and the currently serving beam (e.g., by giving higher priority to beams spatially adjacent to the currently serving beam). In yet another example, the UE may select beams at least in part on the amount of time since the last beam measurement (no-access time), such that beams with longer no-access times have higher priority than beams with shorter no-access times.

[0096] In some examples, the UE can compile a priority beam set, which can be a subset of the candidate beam set. For example, the priority beam set may include all currently serving beams. Based on recent measurements, the priority beam set may also include all candidate beams with signal strength above a signal strength threshold. The priority beam set may also include other beams that meet one or more priority criteria.

[0097] The UE can select candidate beams for measurement during the dynamic transmission time 315, such that each beam in the priority beam set can be measured at least once during the search and measurement period (i.e., at least once during the dynamic transmission time 315 of any of the synchronization signal transmission times of the fifth to sixteenth schedules).

[0098] The UE can operate in a periodic manner. For example, after the synchronization signal transmission time of the sixteenth schedule, the UE can begin a new search and measurement period by detecting the beam during four static transmission times 320. In other examples, the UE can operate according to other periodicities (e.g., synchronization signal transmission times of thirty-two schedules, synchronization signal transmission times of sixty-four schedules, etc.).

[0099] In the second sequence 310, the static transmission time 330 can be evenly spaced throughout the search and measurement periods, at least in part, based on the number of available UE receive beams. For example, for a UE with four available receive beams, the static transmission time 330 could be located within the synchronization signal transmission times scheduled in the first, fifth, ninth, and thirteenth periods. In other examples, the static transmission time 330 could be located elsewhere, with regular intervals, irregular intervals, or no intervals between each static transmission time.

[0100] In some examples, the first search and measurement period of the second sequence 310 may represent the initial search and measurement period (e.g., the UE may not have performed any previous measurements). Therefore, the UE may perform the first search and measurement procedure (S / M-1) during the first static transmission time 330-a, and may create a candidate beam set based on the beams discovered during the first search and measurement procedure. The UE may add other beams discovered as a result of the remaining three search and measurement procedures, such that the UE may not have a complete set of candidate beams from which it can choose until the fourteenth scheduled synchronization signal transmission time. During the second search and measurement period (starting at the seventeenth scheduled synchronization signal transmission time), the UE may update the list of candidate beams. Accordingly, during the twenty-second scheduled synchronization signal transmission time, the UE can dynamically select from the list of candidate beams discovered during the search and measurement procedures in the ninth and thirteenth scheduled synchronization signal transmission times of the first search and measurement period and in the seventeenth and twenty-first scheduled synchronization signal transmission times of the second search and measurement period.

[0101] In the second sequence 310, the three synchronization signal transmission times following each static transmission time 330 can be used for dynamic measurements. During the dynamic transmission time 325, the UE can select one or more candidate beams for measurement, as discussed above with respect to the first sequence 305 (e.g., selected from the current beam set based on previous search and measurement periods).

[0102] Figure 4 Examples of wireless device 400 are shown according to various aspects of this disclosure. In some examples, wireless device 400 may be a reference. Figure 1 and 2 Examples of various aspects of UE 115 and / or UE 210 described.

[0103] Wireless device 400 may include a radio frequency (RF) configuration module 405, which may be implemented in RF software. The RF configuration module 405 may control the antenna of wireless device 400 so that wireless device 400 may use one of a plurality of available UE beams for receiving and / or transmitting.

[0104] The wireless device may also include a beam management module, which includes a General Mobility Server (GMS) 410, a beam database 415, and a beam measurement processor 420. GMS 410 can control the operation of the wireless device 400 during scheduled synchronization signal transmission times. For example, GMS 410 can instruct the RF configuration module which beam to measure during the scheduled synchronization signal transmission time (i.e., which UE to use to receive the beam). GMS 410 can also instruct the measurement module 425 in the firmware which beams to search for and measure during the scheduled synchronization signal transmission time (i.e., which base station transmit beams to search for and measure). GMS 410 can use information stored in the beam database 415 as input.

[0105] Beam database 415 can store various information related to the beam management process. For example, beam database 415 can store a set of candidate beams discovered during the beam discovery process. Beam database 415 can also store signal strength measurements for the discovered beams. In some examples, beam database 415 can store both current signal strength measurements and historical signal strength measurements (e.g., where historical signal strength measurements can be refreshed in a first-in, first-out manner). Beam database 415 can also store information about which beams are currently serving beams.

[0106] Measurement module 425 can receive search and measurement results during the scheduled synchronization signal transmission time. Measurement module 425 can provide information to beammetry processor 420 for processing. For example, beammetry processor 420 can filter and / or fold information received from measurement module 425, and can provide the processed information to beam database 415 so that the information in the database can be updated.

[0107] GMS 410 can determine a set of scheduled synchronization signal transmission times. This set of scheduled synchronization signal transmission times can be predefined (e.g., by technical standards) or can be indicated in signaling from the base station. In some examples, the set of scheduled synchronization signal transmission times can be based at least in part on the number of candidate beams, the hardware measurement capabilities of the wireless device 400, or a combination thereof. A first subset of the set of scheduled synchronization signal transmission times can be allocated for dynamic measurements. A second subset of the scheduled synchronization signal transmission times can be allocated for static measurements.

[0108] During the synchronization signal transmission time of the second subset of the schedule (i.e., the synchronization signal transmission time of the schedule allocated for static transmission), GMS 410 can select the UE receive beam (e.g., UE receive beam A) to be used during the synchronization signal transmission time. GMS 410 can send instructions to RF configuration module 405 to configure the antenna of wireless device 400 according to UE receive beam A. GMS 410 can also send instructions to measurement module 425 to cause wireless device 400 to discover the beam associated with UE receive beam A. In some examples, GMS 410 can also send instructions to measurement module 425 to measure some or all of the discovered beams, for example, based at least in part on the hardware measurement capabilities of wireless device 400.

[0109] Measurement module 425 can report discovered beams to beam database 415 via beam measurement processor 420, and, where applicable, report associated measurements. Therefore, beam database 415 can be updated to create or supplement the list of candidate beams. In some examples, beam database 415 can also select new serving beam pairs and update RF configuration module 405 accordingly.

[0110] During the synchronization signal transmission time of the schedule in the first subset (i.e., the synchronization signal transmission time of the schedule allocated for dynamic transmission), GMS 410 can determine whether to measure one or more beams from the candidate beam set. The candidate beam set can be obtained from the beam database 415, for example, based at least in part on beams discovered during static measurements. GMS 410 can make this determination at least in part based on a metric function and / or a selection algorithm.

[0111] In some examples, GMS 410 may use a two-step scheduling to select a beam for each dynamic transmission time. GMS 410 may first select one of the available UE transmission beams (e.g., UE receive beam B). GMS 410 may send instructions to RF configuration module 405 to configure the antenna of wireless device 400 according to UE receive beam B. After selecting the UE transmission beam, GMS 410 may then select one or more beams corresponding to the selected UE receive beam. For example, GMS 410 may identify fifteen beams corresponding to UE receive beam B during a static transmission time. GMS 410 may select one or more of these fifteen beams for measurements during the dynamic transmission time. GMS 410 may send instructions to measurement module 425 to measure one or more of the fifteen beams. In some examples, GMS 410 may determine that no measurements are performed during the dynamic transmission time and may accordingly avoid providing measurement instructions to measurement module 425.

[0112] In some examples, GMS 410 may select candidate beams for measurement based at least in part on fairness metrics, signal strength metrics, spatial metrics, temporal metrics, or combinations thereof. For example, GMS 410 may select candidate beams at least in part on a weighted fairness metric. In another example, beam database 415 may store information about historical signal strength measurements, and GMS 410 may select candidate beams at least in part on historical signal strength measurements (e.g., signal strength measurements over the most recent n transmission times). In yet another example, GMS 410 may select beams at least in part on the spatial distance between the beam and the currently serving beam (e.g., by giving higher priority to beams spatially adjacent to the currently serving beam). In yet another example, GMS 410 may select beams at least in part on the amount of time since the last beam measurement (no-access time), such that beams with longer no-access times have higher priority than beams with shorter no-access times.

[0113] In some examples, the beam database 415 can compile a priority beam set, which can be a subset of the candidate beam set. For example, the priority beam set may include all currently serving beams. Based on recent measurements, the priority beam set may also include all candidate beams with signal strengths above a signal strength threshold. The priority beam set may also include other beams that meet one or more priority criteria.

[0114] The GMS 410 can select candidate beams for measurement during the dynamic transmission time, so that each beam in the priority beam set can be measured at least once during the search and measurement period.

[0115] GMS 410 may be able to handle various hardware and / or software constraints or specification requirements for different objectives. In some examples, GMS 410 may be able to measure up to a certain number of beams during each measurement duration (which may be TTI, SSBS, etc.). In some examples, GMS 410 may be able to maintain the periodicity of the serving beams in the serving cell. In some examples, GMS 410 may be able to grant more scheduling opportunities to the serving cell compared to neighboring cells. In some examples, GMS 410 may limit the number of component carriers that can be measured per scheduling opportunity. In some examples, GMS 410 may fix the mapping between the number of component carriers and component carriers within an SSBS. In some examples, GMS 410 may limit the number of cells that can be measured per scheduling opportunity.

[0116] Figure 5Examples of a scheduling synchronization signal transmission time sequence 500 in a wireless communication system are shown according to various aspects of this disclosure. In some examples, the wireless communication system may implement aspects of wireless communication system 100 or 200.

[0117] A wireless communication system may include a base station and a UE, which may be a reference. Figures 1 to 4 An example of a described wireless device. The wireless communication system may include two cells and two component carriers. The UE may have four PO receive beams. Due to hardware limitations of the UE, the UE may be able to measure two beams in each SSBS. The search and measurement period in the scheduled synchronization signal transmission time series 500 may be 320 milliseconds (e.g., 16 SSBSs). Due to the length of the search and measurement period, the maximum size of the preferred candidate beam set may be 16.

[0118] The time series 500 of the scheduled synchronization signal transmission can be divided into a first subset of the scheduled synchronization signal transmission time allocated for dynamic measurement and a second subset of the scheduled synchronization signal transmission time allocated for static measurement.

[0119] A second subset of the scheduled synchronization signal transmission times may include static measurement times 505 scheduled every other scheduled synchronization signal transmission time. For example, a beam discovery process may be performed using a first receive beam during the first two static measurement times 505-a and 505-b, a second receive beam during the next two static measurement times 505-c and 505-d, a third receive beam during the next two static measurement times 505-e and 505-f, and a fourth receive beam during the last two static measurement times 505-g and 505-h. The base station may also perform measurements during static measurement times 505-a to 505-h. However, due to hardware limitations, the UE may perform measurements on a subset of the discovered beams. For example, the UE may perform measurements using two combinations of component carriers and cells (e.g., component carrier 1 on cell 1 and component carrier 1 on cell 2) (e.g., where the component carriers and cells are parameters for dynamically scheduled beams). Different combinations of component carriers and cells (e.g., component carrier 2 on cell 1 and component carrier 2 on cell 2) can be measured at different static measurement times 505-a and 505-b corresponding to the first received beam.

[0120] The remaining scheduled synchronization signal transmission time during the search and measurement period can be the dynamic measurement time 510-a to 510-h, for example, the synchronization signal transmission time allocated for the dynamic measurement schedule. During each of the dynamic measurement times 510-a to 510-h, the UE can identify one or more beams for measurement, as described above. Figures 2 to 4 Described.

[0121] In some examples, the UE can be based on the generalized mobility metric function f. GM To select one or more beams for measurement, f GM This can be achieved using a weighted counter:

[0122]

[0123] Where w is the priority weight for the beam, and c is a counter for the beam, which increments by 1 after each measurement of the beam. The metric function of Equation 1 can be initialized by obtaining the measurement values ​​of each beam [icc][icell][itx][irx] from the database. The counter for all beams can be reset to 1. Then, the metric function of Equation 1 can be calculated for each beam [icc][icell][itx][irx], and the calculated values ​​can be stored in a database, for example, as shown in Table 1.

[0124] [icc][icell] / [irx] PO Rx1 PO Rx2 PO Rx3 PO Rx4 [1][1] 1 / 3 1 / 3 1 / 3 1 / 3 [1][2] 1 / 2 1 1 / 3 1 / 3 [2][1] 1 1 / 2 1 1 [2][2] 1 / 2 1 / 2 1 1

[0125] Table 1

[0126] During each dynamic measurement period 510-a to 510-h, the UE can select one or more beams for measurement, at least in part, based on a metric function. In some examples, the UE can select one or more beams for each SSBS. For example, for a given base station transmit beam (corresponding to an SSBS), the UE can determine the minimum value of the metric function for all combinations of component carriers and cells. The UE can then select a receive beam, at least in part, based on the minimum value. The UE can then rank the combinations of component carriers and cells based on the metric function. The UE can then measure multiple top-ranked beams (e.g., the two highest-ranked beams) and update the counter c for the measured beam.

[0127] For example, Table 1 could represent the value of a metric function at the beginning of a scheduled synchronization signal transmission time series (e.g., based on measurements during a previous time period). During the first dynamic measurement time 510-a, the UE could consult Table 1 to identify the minimum metric function value. Each of receive beams 2, 3, and 4 could have a minimum value of 1 / 3. For example, due to the increment of counter c and / or weight w, the minimum value of receive beam 1 might have changed based on measurements during the first static measurement time 505-a, but might not be less than 1 / 3. Receive beam 2 could be selected because it has the lowest minimum value, even if it might be at least in tandem with receive beams 3 and 4. In some examples, receive beam 2 could be selected at least in part based on the average value or the next lowest value.

[0128] The UE can then rank the beams in reverse order of the metric function. Based on Table 1 (f = 1 / 3), the UE can rank beam [1][1] highest, beams [2][1] and [2][2] second highest (f = 1 / 2), and beam [1][2] lowest (f = 1). The UE can select the two highest beams for measurement (e.g., beams [1][1] and [2][1]). Accordingly, the UE can measure beams [1][1] and [2][1], and can update the metric function for the measured beams at least in part based on the increment of counter c and / or the change in weight w. The same procedure can be used to select the beams for measurement during each dynamic measurement time 510-a to 510-h. In some examples, the UE may avoid performing any measurements during the dynamic measurement period 510-a to 510-h unless the metric function is below a certain threshold (e.g., a pre-configured threshold at the UE, a threshold configured by the base station, or a dynamic threshold based on one or more parameters such as channel quality or serving beam parameters).

[0129] Figure 6 A block diagram 600 of a wireless device 605 is shown according to various aspects of this disclosure. The wireless device 605 may be an example of various aspects of a UE 115 as described herein. The wireless device 605 may include a receiver 610, a communications manager 615, and a transmitter 620. The wireless device 605 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0130] Receiver 610 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, information, etc. related to mobility scheduling). It can pass this information to other components of the device. Receiver 610 can be a reference. Figure 9Examples of various aspects of the transceiver 935 are described. The receiver 610 can utilize a single antenna or a set of antennas.

[0131] Communication Manager 615 can be used as a reference Figure 9 Examples of various aspects of the Communication Manager 915 are described.

[0132] At least some of the communication manager 615 and / or its various sub-components may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functionality of at least some of the communication manager 615 and / or its various sub-components may be performed by a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware component, or any combination thereof, designed to perform the functions described in this disclosure. At least some of the communication manager 615 and / or its various sub-components may be physically located in various locations, including being distributed such that some of the functions are implemented by one or more physical devices at different physical locations. In some examples, according to various aspects of this disclosure, at least some of the communication manager 615 and / or its various sub-components may be separate and distinct components. In other examples, according to various aspects of this disclosure, at least some of the communication manager 615 and / or its various sub-components may be combined with one or more other hardware components (including, but not limited to, input / output (I / O) components, transceivers, network servers, other computing devices, one or more other components described in this disclosure, or combinations thereof).

[0133] The communication manager 615 can perform the following operations: determine a set of scheduled synchronization signal transmission times; select at least one candidate beam from a set of candidate beams for dynamic measurement during a scheduled synchronization signal transmission time in a first subset of the set of scheduled synchronization signal transmission times, wherein the first subset of the set of scheduled synchronization signal transmission times is allocated for dynamic measurement; perform a measurement procedure on the at least one candidate beam during a scheduled synchronization signal transmission time in the first subset of the set of scheduled synchronization signal transmission times; and send at least one measurement report corresponding to the measurement procedure performed on the at least one candidate beam.

[0134] Transmitter 620 can transmit signals generated by other components of the device. In some examples, transmitter 620 can be co-located with receiver 610 in a transceiver module. For example, transmitter 620 can be a reference... Figure 9 Examples of various aspects of the transceiver 935 are described. The transmitter 620 can utilize a single antenna or a set of antennas.

[0135] Figure 7 A block diagram 700 of a wireless device 705 is shown according to various aspects of this disclosure. The wireless device 705 may be as described in the reference. Figure 6 Examples of various aspects of the described wireless device 605 or UE 115. Wireless device 705 may include a receiver 710, a communication manager 715, and a transmitter 720. Wireless device 705 may also include a processor. Each of these components may communicate with each other (e.g., via one or more buses).

[0136] Receiver 710 can receive information such as packets, user data, or control information associated with various information channels (e.g., control channels, data channels, etc.). It can transmit this information to other components of the device. Receiver 710 can serve as a reference. Figure 9 Examples of various aspects of the transceiver 935 are described. The receiver 710 can utilize a single antenna or a set of antennas.

[0137] Communication Manager 715 can be used as a reference Figure 9 Examples of various aspects of the described communication manager 915 are provided. The communication manager 915 may also include a synchronization set determination unit 725, a dynamic beam selector 730, a measurement unit 735, and a measurement report generator 740.

[0138] The synchronization set determination unit 725 can determine the set of scheduled synchronization signal transmission times. In some cases, the set of scheduled synchronization signal transmission times is determined based on search and measurement periods.

[0139] The dynamic beam selector 730 can select at least one candidate beam from a set of candidate beams for dynamic measurements during a scheduled synchronization signal transmission time within a first subset of the set of scheduled synchronization signal transmission times, wherein the first subset of the set of scheduled synchronization signal transmission times is allocated for dynamic measurements. In some cases, at least one candidate beam is selected from the set of candidate beams based on: fairness metrics, signal strength metrics, spatial metrics, timing metrics, or combinations thereof. In some cases, the fairness metric includes a weighted fairness metric. In some cases, the signal strength metric includes signal strength based on historical measurements. In some cases, the spatial metric includes the spatial distance to the serving beam. In some cases, the timing metric includes no-access time.

[0140] Measurement unit 735 may perform a measurement procedure on at least one candidate beam during a scheduled synchronization signal transmission time within a first subset of the scheduled synchronization signal transmission time. In some cases, measurement unit 735 may perform a measurement procedure on each preferred candidate beam in the preferred candidate beam set at least once during the search and measurement period. Alternatively, measurement unit 735 may perform a measurement procedure on at least one beam identified during the beam scanning process during a second subset of the scheduled signal transmission time.

[0141] The measurement report generator 740 can send at least one measurement report corresponding to the measurement process performed on at least one candidate beam.

[0142] Transmitter 720 can transmit signals generated by other components of the device. In some examples, transmitter 720 can be co-located with receiver 710 in a transceiver module. For example, transmitter 720 can be a reference... Figure 9 Examples of various aspects of the transceiver 935 are described. The transmitter 720 can utilize a single antenna or a set of antennas.

[0143] Figure 8 A block diagram 800 of a communication manager 815 is shown according to various aspects of this disclosure. The communication manager 815 may be a reference... Figure 6 , 7 Examples of aspects of the communication manager 615, communication manager 715, or communication manager 915 described in 9. Communication manager 815 may include a synchronization set determination unit 820, a dynamic beam selector 825, a measurement unit 830, a measurement report generator 835, a UE receive beam selector 840, a priority beam identifier 845, a beam scanner 850, and a candidate beam set identifier 855. Each of these modules may communicate directly or indirectly with each other (e.g., via one or more buses).

[0144] The synchronization set determination unit 820 can determine the set of scheduled synchronization signal transmission times. In some cases, the set of scheduled synchronization signal transmission times is determined based on search and measurement periods.

[0145] The dynamic beam selector 825 can select at least one candidate beam from a set of candidate beams for dynamic measurements during a scheduled synchronization signal transmission time within a first subset of the set of scheduled synchronization signal transmission times, wherein the first subset of the set of scheduled synchronization signal transmission times is allocated for dynamic measurements. In some cases, at least one candidate beam is selected from the set of candidate beams based on: fairness metrics, signal strength metrics, spatial metrics, timing metrics, or combinations thereof. In some cases, the fairness metric includes a weighted fairness metric. In some cases, the signal strength metric includes signal strength based on historical measurements. In some cases, the spatial metric includes the spatial distance to the serving beam. In some cases, the timing metric includes no-access time.

[0146] Measurement unit 830 can perform a measurement procedure on at least one candidate beam during a scheduled synchronization signal transmission time within a first subset of the scheduled synchronization signal transmission time. Measurement report generator 835 can send at least one measurement report corresponding to the measurement procedure performed on at least one candidate beam.

[0147] In some examples, performing the measurement process may involve: the UE receive beam selector 840 selecting a UE receive beam for a scheduled synchronization signal transmission time from a first subset of the scheduled synchronization signal transmission times. In these examples, the dynamic beam selector 825 may select at least one candidate beam corresponding to the selected UE receive beam from a subset of the candidate beam set.

[0148] In some examples, performing the measurement process may involve: a priority beam identifier 845 identifying a priority candidate beam set from the candidate beam set; and a measurement unit 830 performing a measurement process at least once for each priority candidate beam in the priority candidate beam set during the search and measurement period.

[0149] Beam scanner 850 can perform a beam scanning process for each UE-received beam in the UE-received beam set during a second subset of the scheduled synchronization signal transmission times (e.g., where the second subset differs from the first subset), wherein the second subset of the scheduled synchronization signal transmission times is allocated for static measurements based on the number of UE-received beams in the UE-received beam set. Measurement unit 830 can perform additional measurement processes on at least one beam identified based on the beam scanning process during the second subset of the scheduled synchronization signal transmission times. Candidate beam set identifyr 855 can determine a candidate beam set based on the beam scanning process for each UE-received beam in the UE-received beam set.

[0150] Figure 9Figures of a system 900 including device 905 are shown according to various aspects of this disclosure. Device 905 may be an example of or a component including the following: as described herein (e.g., references to...). Figures 1 to 7 The wireless device 605, wireless device 705, or UE 115 described herein. Device 905 may include components for two-way voice and data communication, including components for transmitting and receiving communications, including: a communication manager 915, a processor 920, a memory 925, software 930, a transceiver 935, an antenna 940, and an I / O controller 945. These components may communicate electronically via one or more buses (e.g., bus 910). Device 905 may communicate wirelessly with one or more base stations 105.

[0151] The Communication Manager 915 can execute references as described in this article. Figures 6 to 8 One or more of the functions described in the Communication Manager 615, Communication Manager 715 or Communication Manager 815.

[0152] Processor 920 may include intelligent hardware devices (e.g., general-purpose processors, DSPs, central processing units (CPUs), microcontrollers, ASICs, FPGAs, programmable logic devices, discrete gate or transistor logic components, discrete hardware components, or any combination thereof). In some cases, processor 920 may be configured to use a memory controller to operate a memory array. In other cases, the memory controller may be integrated into processor 920. Processor 920 may be configured to execute computer-readable instructions stored in memory to perform various functions (e.g., functions or tasks supporting a generalized mobility scheduling framework).

[0153] Memory 925 may include random access memory (RAM) and read-only memory (ROM). Memory 925 may store computer-readable, computer-executable software 930 including instructions that, when executed, cause the processor to perform the various functions described herein. In some cases, memory 925 may also include a basic input / output system (BIOS), which controls basic hardware or software operations (such as interaction with peripheral components or devices).

[0154] Software 930 may include code for implementing various aspects of this disclosure, including code for supporting a generalized mobility scheduling framework. Software 930 may be stored in a non-transitory computer-readable medium, such as system memory or other memory. In some cases, software 930 may not be directly executable by a processor, but may enable a computer (e.g., when compiled and executed) to perform the functions described herein.

[0155] Transceiver 935 can communicate bidirectionally via one or more antennas, wired or wireless links as described above. For example, transceiver 935 can represent a wireless transceiver and can communicate bidirectionally with another wireless transceiver. Transceiver 935 may also include a modem for modulating packets and providing modulated packets to the antenna for transmission, and for demodulating packets received from the antenna.

[0156] In some cases, a wireless device may include a single antenna 940. However, in other cases, a device may have more than one antenna 940, which may be able to transmit or receive multiple wireless transmissions concurrently.

[0157] The I / O controller 945 can manage input and output signals for device 905. The I / O controller 945 can also manage peripheral devices not integrated into device 905. In some cases, the I / O controller 945 can represent the physical connection or port to an external peripheral device. In some cases, the I / O controller 945 can utilize, for example... The operating system may be a known operating system. In other cases, the I / O controller 945 may represent or interact with a modem, keyboard, mouse, touchscreen, or similar device. In some cases, the I / O controller 945 may be implemented as part of a processor. In some cases, a user may interact with the device 905 via the I / O controller 945 or via hardware components controlled by the I / O controller 945.

[0158] Figure 10 A flowchart illustrating method 1000 is shown according to various aspects of this disclosure. Operation of method 1000 can be implemented by a UE 115 or its components as described herein. For example, operation of method 1000 can be implemented by, as referenced... Figures 6 to 9 The communication manager described herein is used for execution. In some examples, UE 115 may execute a set of code to control the functional elements of the device to perform the functions described below. Alternatively, UE 115 may use dedicated hardware to perform aspects of the functions described below.

[0159] At point 1005, UE 115 can determine the set of scheduled synchronization signal transmission times. The operation at 1005 can be performed according to the method described herein. In some examples, aspects of the operation at 1005 can be determined by reference to... Figures 6 to 9 The described synchronization set determines the unit to be executed.

[0160] At 1010, UE 115 can select at least one candidate beam from the candidate beam set for dynamic measurement during a scheduled synchronization signal transmission time in a first subset of the set of scheduled synchronization signal transmission times, wherein the first subset of the set of scheduled synchronization signal transmission times is allocated for dynamic measurement. The operation of 1010 can be performed according to the method described herein. In some examples, aspects of the operation of 1010 can be derived from, as referenced... Figures 6 to 9 The described dynamic beam selector is used to perform this.

[0161] At 1015, UE 115 may perform a measurement procedure on at least one candidate beam during a scheduled synchronization signal transmission time within a first subset of the scheduled synchronization signal transmission times. The operation of 1015 can be performed according to the method described herein. In some examples, aspects of the operation of 1015 may be derived from, as referenced... Figures 6 to 9 The measurement unit described is used to perform the measurement.

[0162] At point 1020, UE 115 may send at least one measurement report corresponding to a measurement procedure performed on at least one candidate beam. The operation of 1020 may be performed according to the methods described herein. In some examples, aspects of the operation of 1020 may be derived from, as referenced... Figures 6 to 9 The described measurement report generator is used to perform this.

[0163] It should be noted that the methods described above describe possible implementations, and that the operations and steps can be rearranged or otherwise modified, and that other implementations are possible. Furthermore, aspects from two or more methods can be combined.

[0164] The techniques described in this article can be used in various wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), and other systems. CDMA systems can implement radio technologies such as CDMA 2000 and Universal Terrestrial Radio Access (UTRA). CDMA2000 encompasses the IS-2000, IS-95, and IS-856 standards. Versions of IS-2000 are often referred to as CDMA2000 1X, 1X, etc. IS-856 (TIA-856) is often referred to as CDMA2000 1xEV-DO, High-Speed ​​Packet Data (HRPD), etc. UTRA includes Wideband CDMA (W-CDMA) and other variations of CDMA. TDMA systems can implement radio technologies such as Global System for Mobile Communications (GSM).

[0165] OFDMA systems can implement radio technologies such as Ultra Mobile Broadband (UMB), E-UTRA, IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, and Flash-OFDM. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE, LTE-A, and LTE-A Pro are versions of UMTS using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR, and GSM are described in documents from an organization called the 3rd Generation Partnership Project (3GPP). CDMA2000 and UMB are described in documents from an organization called the 3rd Generation Partnership Project 2 (3GPP2). The technologies described herein can be used in the systems and radio technologies mentioned above, as well as other systems and radio technologies. While aspects of LTE, LTE-A, LTE-A Pro, or NR systems may be described for illustrative purposes, and the terms LTE, LTE-A, LTE-A Pro, or NR may be used in most of the description, the techniques described herein are applicable to a range of applications beyond LTE, LTE-A, LTE-A Pro, or NR.

[0166] Macro cells typically cover a relatively large geographic area (e.g., a radius of several kilometers) and allow unrestricted access by UE 115 with a service subscription to a network provider. In contrast, small cells can be associated with a lower-power base station 105 and can operate in the same or different (e.g., licensed, unlicensed, etc.) frequency bands as macro cells. Depending on the examples, small cells can include pico cells, femto cells, and microcells. For example, a pico cell can cover a small geographic area and allow unrestricted access by UE 115 with a service subscription to a network provider. A femto cell can also cover a small geographic area (e.g., a residential area) and provide restricted access by UE 115 associated with that femto cell (e.g., UE 115 in a Closed Subscriber Group (CSG), UE 115 for a user in a residential area, etc.). An eNB for a macro cell can be referred to as a macro eNB. An eNB for a small cell can be referred to as a small cell eNB, pico eNB, femto eNB, or home eNB. eNB can support one or more (e.g., two, three, four, etc.) cells, and can also support communication using one or more component carriers.

[0167] The wireless communication system 100 or more systems described herein can support synchronous or asynchronous operation. For synchronous operation, base stations 105 can have similar frame timing, and transmissions from different base stations 105 can be approximately time-aligned. For asynchronous operation, base stations 105 can have different frame timing, and transmissions from different base stations 105 can be time-disaligned. The techniques described herein can be used for both synchronous and asynchronous operation.

[0168] The information and signals described herein can be represented using any of a variety of different techniques and methods. For example, the data, instructions, commands, information, signals, bits, symbols, and chips that may be mentioned throughout the above description can be represented by voltage, current, electromagnetic waves, magnetic fields or particles, light fields or particles, or any combination thereof.

[0169] The various illustrative blocks and modules described in connection with this disclosure can be implemented or executed using a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. The general-purpose processor may be a microprocessor, but alternatively, the processor may be any conventional processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration).

[0170] The functionality described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functionality can be stored as one or more instructions or code on or transmitted through a computer-readable medium. Other examples and implementations are within the scope of this disclosure and the appended claims. For example, due to the nature of software, the functionality described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or any combination of these. Features implementing the functionality can also be physically located in various locations, including being distributed such that different parts of the functionality are implemented in different physical locations.

[0171] Computer-readable media includes both non-transitory computer storage media and communication media, with communication media encompassing any medium that facilitates the transfer of a computer program from one place to another. Non-transitory storage media can be any available medium accessible by a general-purpose computer or a special-purpose computer. By way of example, and not limitation, non-transitory computer-readable media can include RAM, ROM, electrically erasable programmable read-only memory (EEPROM), flash memory, compressed optical disc (CD) ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other non-transitory medium capable of carrying or storing desired units of program code in the form of instructions or data structures and accessible by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor. Furthermore, any connection is appropriately referred to as computer-readable media. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included within the definition of media. As used herein, disks and optical discs include CDs, laser discs, optical discs, digital multifunction discs (DVDs), floppy disks, and Blu-ray discs. Disks typically copy data magnetically, while optical discs use lasers to copy data optically. The combinations described above are also included within the scope of computer-readable media.

[0172] As used herein (including in the claims), the word "or" in a list of items (e.g., a list of items ending with a phrase such as "at least one of" or "one or more of") indicates an inclusive list, such that a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C). Furthermore, as used herein, the phrase "based on" should not be construed as a reference to a closed set of conditions. For example, an exemplary step described as "based on condition A" may be based on both condition A and condition B without departing from the scope of this disclosure. In other words, as used herein, the phrase "based on" should be interpreted in the same way as the phrase "at least partially based on".

[0173] In the accompanying drawings, similar components or features may have the same reference numerals. Furthermore, components of the same type can be distinguished by a dash followed by a second reference numeral, used to differentiate between similar components. If only the first reference numeral is used in the specification, the description applies to any one of the similar components having the same first reference numeral, without regard to the second or other subsequent reference numerals.

[0174] This document describes exemplary configurations with reference to the accompanying drawings, and does not represent all examples that can be implemented or are within the scope of the claims. The term "exemplary" as used herein means "serving as an example, instance, or illustration," and not "preferred" or "advantageous over other examples." Specific details are included to provide an understanding of the described techniques. However, these techniques can be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form to avoid obscuring the concepts of the described examples.

[0175] The description herein is provided to enable those skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the scope of the present disclosure. Therefore, the present disclosure is not limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for conducting wireless communication at a user equipment (UE), comprising: Receive an indication of the scheduled set of synchronization signal transmission times; During a first subset of the scheduled set of synchronization signal transmission times, multiple receive beams are used at the UE to measure multiple transmit beams, the first subset of the scheduled set of synchronization signal transmission times being associated with a first number of synchronization signal transmission times during a periodic search and measurement period. The measurement is based at least in part on signal strength measurements of the plurality of transmit beams at the UE using the plurality of receive beams during a first subset of the scheduled set of synchronization signal transmission times, and the measurement of the plurality of transmit beams at the UE using a subset of the plurality of receive beams during a second subset of the scheduled set of synchronization signal transmission times, the second subset of the scheduled set of synchronization signal transmission times being associated with a second number of synchronization signal transmission times during the periodic search and measurement period, the second number being greater than or equal to the first number; as well as At least one measurement report is sent based at least in part on measurements of the plurality of transmit beams at the UE using the subset of the plurality of receive beams during the second subset of the scheduled set of synchronization signal transmission times.

2. The method of claim 1, wherein, Measuring the plurality of transmit beams during a first subset of the scheduled set of synchronization signal transmission times, during a second subset of the scheduled set of synchronization signal transmission times, or both, includes: Multiple base station beams are measured during cyclic scanning.

3. The method according to claim 1, further comprising: The subset of the plurality of received beams is determined at least in part based on signal strength metrics.

4. The method according to claim 1, further comprising: The subset of the plurality of received beams is determined at least in part based on the current serving beam standard.

5. The method according to claim 1, further comprising: The subset of the plurality of received beams is determined at least in part based on spatial metrics.

6. The method according to claim 1, further comprising: The subset of the plurality of received beams is determined at least in part based on timing metrics.

7. The method according to claim 1, further comprising: The subset of the plurality of received beams is determined at least in part based on the hardware capabilities of the UE.

8. The method according to claim 1, further comprising: The set of scheduled synchronization signal transmission times is determined at least in part based on the number of candidate beams.

9. The method according to claim 1, further comprising: The set of scheduled synchronization signal transmission times is determined based at least in part on the hardware capabilities of the UE.

10. The method according to claim 1, further comprising: Signaling is received from a base station, the signaling defining a first subset of the scheduled synchronization signal transmission time set and a second subset of the scheduled synchronization signal transmission time set.

11. The method according to claim 1, further comprising: Determine a first subset of the scheduled synchronization signal transmission time set and a second subset of the scheduled synchronization signal transmission time set at the UE.

12. The method according to claim 1, further comprising: During the first subset of the scheduled synchronization signal transmission time set, the plurality of receive beams are used at the UE to measure one or more second transmit beams; as well as The plurality of transmit beams are selected at the UE by measuring the plurality of transmit beams and the one or more second transmit beams using the plurality of receive beams during the first subset of the scheduled set of synchronization signal transmission times.

13. The method of claim 1, wherein, The periodic search and measurement periods are associated with sixteen synchronization signal transmission times.

14. The method according to claim 1, wherein, During the periodic search and measurement period, the first scheduled synchronization signal transmission time of the first subset of the scheduled synchronization signal transmission time set and the second scheduled synchronization signal transmission time of the first subset of the scheduled synchronization signal transmission time set are separated by one or more scheduled synchronization signal transmission times of the second subset of the scheduled synchronization signal transmission time set.

15. The method of claim 1, wherein, Each scheduled synchronization signal transmission time in the set of scheduled synchronization signal transmission times is associated with a respective set of synchronization signal bursts that includes multiple synchronization signal blocks.

16. The method of claim 15, wherein, Each of the plurality of synchronization signal blocks corresponds to a respective transmission beam among the plurality of transmission beams.

17. An apparatus for conducting wireless communication at a user equipment (UE), comprising: One or more processors; as well as One or more memories coupled to the one or more processors, the one or more processors being configured to cause the UE to perform the following operations: Receive an indication of the scheduled set of synchronization signal transmission times; During a first subset of the scheduled set of synchronization signal transmission times, multiple receive beams are used at the UE to measure multiple transmit beams, the first subset of the scheduled set of synchronization signal transmission times being associated with a first number of synchronization signal transmission times during a periodic search and measurement period. The measurement is based at least in part on signal strength measurements of the plurality of transmit beams at the UE using the plurality of receive beams during a first subset of the scheduled set of synchronization signal transmission times, and the measurement of the plurality of transmit beams at the UE using a subset of the plurality of receive beams during a second subset of the scheduled set of synchronization signal transmission times, the second subset of the scheduled set of synchronization signal transmission times being associated with a second number of synchronization signal transmission times during the periodic search and measurement period, the second number being greater than or equal to the first number; as well as At least one measurement report is sent based at least in part on measurements of the plurality of transmit beams at the UE using the subset of the plurality of receive beams during the second subset of the scheduled set of synchronization signal transmission times.

18. The apparatus of claim 17, wherein, In order to measure the plurality of transmit beams during a first subset of the scheduled synchronization signal transmission time set, during a second subset of the scheduled synchronization signal transmission time set, or both, the one or more processors are configured to cause the UE to perform the following operations: Multiple base station beams corresponding to the UE are measured during cyclic scanning.

19. The apparatus of claim 17, wherein, The one or more processors are configured to cause the UE to perform the following operations: The subset of the plurality of received beams is determined at least in part based on signal strength metrics.

20. The apparatus of claim 17, wherein, The one or more processors are configured to cause the UE to perform the following operations: The subset of the plurality of received beams is determined at least in part based on the current serving beam standard.

21. The apparatus of claim 17, wherein, The one or more processors are configured to cause the UE to perform the following operations: The subset of the plurality of received beams is determined at least in part based on spatial metrics.

22. The apparatus of claim 17, wherein, The one or more processors are configured to cause the UE to perform the following operations: The subset of the plurality of received beams is determined at least in part based on timing metrics.

23. The apparatus of claim 17, wherein, The one or more processors are configured to cause the UE to perform the following operations: The subset of the plurality of received beams is determined at least in part based on the hardware capabilities of the UE.

24. The apparatus of claim 17, wherein, The one or more processors are configured to cause the UE to perform the following operations: The set of scheduled synchronization signal transmission times is determined at least in part based on the number of candidate beams.

25. The apparatus of claim 17, wherein, The one or more processors are configured to cause the UE to perform the following operations: The set of scheduled synchronization signal transmission times is determined based at least in part on the hardware capabilities of the UE.

26. The apparatus according to claim 17, wherein, The one or more processors are configured to cause the UE to perform the following operations: Signaling is received from a base station, the signaling defining a first subset of the scheduled synchronization signal transmission time set and a second subset of the scheduled synchronization signal transmission time set.

27. The apparatus of claim 17, wherein, The one or more processors are configured to cause the UE to perform the following operations: Determine a first subset of the scheduled synchronization signal transmission time set and a second subset of the scheduled synchronization signal transmission time set at the UE.

28. The apparatus of claim 17, further comprising: One or more antenna arrays, The one or more processors are configured to cause the UE to perform the following operations: The plurality of transmit beams are measured using the plurality of receive beams via the one or more antenna arrays during a first subset of the scheduled synchronization signal transmission time set; and The plurality of transmit beams are measured using the subset of the plurality of receive beams via the one or more antenna arrays during the second subset of the scheduled synchronization signal transmission time set.

29. The apparatus of claim 17, wherein, The one or more processors are configured to cause the UE to perform the following operations: During the first subset of the scheduled synchronization signal transmission time set, the plurality of receive beams are used at the UE to measure one or more second transmit beams; as well as The plurality of transmit beams are selected at the UE based at least in part on measurements of the plurality of transmit beams and the one or more second transmit beams using the plurality of receive beams during a first subset of the scheduled set of synchronization signal transmission times.

30. The apparatus of claim 17, wherein, The periodic search and measurement periods are associated with sixteen synchronization signal transmission times.

31. The apparatus of claim 17, wherein, During the periodic search and measurement period, the first scheduled synchronization signal transmission time of the first subset of the scheduled synchronization signal transmission time set and the second scheduled synchronization signal transmission time of the first subset of the scheduled synchronization signal transmission time set are separated by one or more scheduled synchronization signal transmission times of the second subset of the scheduled synchronization signal transmission time set.

32. The apparatus of claim 17, wherein, Each scheduled synchronization signal transmission time in the set of scheduled synchronization signal transmission times is associated with a respective set of synchronization signal bursts that includes multiple synchronization signal blocks.

33. The apparatus of claim 32, wherein, Each of the plurality of synchronization signal blocks corresponds to a respective transmission beam among the plurality of transmission beams.

34. An apparatus for conducting wireless communication at a user equipment (UE), comprising: A unit for receiving an indication of a scheduled set of synchronization signal transmission times; A unit for measuring multiple transmit beams at the UE using multiple receive beams during a first subset of the scheduled set of synchronization signal transmission times, the first subset of the scheduled set of synchronization signal transmission times being associated with a first number of synchronization signal transmission times during a periodic search and measurement period. For measuring signal strength at the UE using the plurality of receive beams to measure the plurality of transmit beams during a first subset of the scheduled set of synchronization signal transmission times, and for measuring the plurality of transmit beams at the UE using a subset of the plurality of receive beams during a second subset of the scheduled set of synchronization signal transmission times, the second subset of the scheduled set of synchronization signal transmission times being associated with a second number of synchronization signal transmission times during the periodic search and measurement period, the second number being greater than or equal to the first number; as well as A unit for transmitting at least one measurement report based at least in part on measurements of the plurality of transmit beams using the subset of the plurality of receive beams at the UE during the second subset of the scheduled set of synchronization signal transmission times.

35. The apparatus of claim 34, wherein, Measuring the plurality of transmit beams during a first subset of the scheduled set of synchronization signal transmission times, during a second subset of the scheduled set of synchronization signal transmission times, or both, includes: A unit used to measure multiple base station beams in cyclic scanning.

36. The apparatus of claim 34, further comprising: Units for determining the subset of the plurality of received beams based at least in part on signal strength metrics.

37. The apparatus of claim 34, further comprising: Units for determining the subset of the plurality of received beams based at least in part on the current serving beam standard.

38. The apparatus of claim 34, further comprising: Units for determining the subset of the plurality of received beams based at least in part on spatial metrics.

39. The apparatus of claim 34, further comprising: A unit for determining the subset of the plurality of received beams based at least in part on the hardware capabilities of the UE.

40. The apparatus of claim 34, further comprising: A unit for determining the first subset and the second subset of the scheduled synchronization signal transmission time set at the UE.

41. The apparatus of claim 34, further comprising: A unit for measuring one or more second transmit beams at the UE using the plurality of receive beams during the first subset of the scheduled synchronization signal transmission time set; as well as Units of the plurality of transmit beams are selected at the UE based at least in part on measurements of the plurality of transmit beams and the one or more second transmit beams using the plurality of receive beams during a first subset of the scheduled set of synchronization signal transmission times.

42. The apparatus of claim 34, wherein, The periodic search and measurement periods are associated with sixteen synchronization signal transmission times.

43. The apparatus according to claim 34, wherein, During the periodic search and measurement period, the first scheduled synchronization signal transmission time of the first subset of the scheduled synchronization signal transmission time set and the second scheduled synchronization signal transmission time of the first subset of the scheduled synchronization signal transmission time set are separated by one or more scheduled synchronization signal transmission times of the second subset of the scheduled synchronization signal transmission time set.

44. The apparatus of claim 34, wherein, Each scheduled synchronization signal transmission time in the set of scheduled synchronization signal transmission times is associated with a respective set of synchronization signal bursts that includes multiple synchronization signal blocks.

45. The device of claim 44, wherein, Each of the plurality of synchronization signal blocks corresponds to a respective transmission beam among the plurality of transmission beams.

46. ​​A non-transitory computer-readable medium storing code for wireless communication at a user equipment (UE), the code including instructions executable by one or more processors to cause the UE to perform the following operations: Receive an indication of the scheduled set of synchronization signal transmission times; During a first subset of the scheduled set of synchronization signal transmission times, multiple receive beams are used at the UE to measure multiple transmit beams, the first subset of the scheduled set of synchronization signal transmission times being associated with a first number of synchronization signal transmission times during a periodic search and measurement period. The measurement is based at least in part on signal strength measurements of the plurality of transmit beams at the UE using the plurality of receive beams during a first subset of the scheduled set of synchronization signal transmission times, and the measurement of the plurality of transmit beams at the UE using a subset of the plurality of receive beams during a second subset of the scheduled set of synchronization signal transmission times, the second subset of the scheduled set of synchronization signal transmission times being associated with a second number of synchronization signal transmission times during the periodic search and measurement period, the second number being greater than or equal to the first number; as well as At least one measurement report is sent based at least in part on measurements of the plurality of transmit beams at the UE using the subset of the plurality of receive beams during the second subset of the scheduled set of synchronization signal transmission times.

47. The non-transitory computer-readable medium of claim 46, wherein, In order to measure the plurality of transmit beams during a first subset of the scheduled set of synchronization signal transmission times, during a second subset of the scheduled set of synchronization signal transmission times, or both, the code includes instructions executable by the one or more processors to cause the UE to perform the following operations: Multiple base station beams corresponding to the UE are measured during cyclic scanning.

48. The non-transitory computer-readable medium of claim 46, wherein, The code includes instructions executable by the one or more processors to cause the UE to perform the following operations: The subset of the plurality of received beams is determined at least in part based on signal strength metrics.

49. The non-transitory computer-readable medium of claim 46, wherein, The code includes instructions executable by the one or more processors to cause the UE to perform the following operations: The subset of the plurality of received beams is determined at least in part based on the current serving beam standard.

50. The non-transitory computer-readable medium of claim 46, wherein, The code includes instructions executable by the one or more processors to cause the UE to perform the following operations: The subset of the plurality of received beams is determined at least in part based on spatial metrics.

51. The non-transitory computer-readable medium of claim 46, wherein, The code includes instructions executable by the one or more processors to cause the UE to perform the following operations: The subset of the plurality of received beams is determined at least in part based on timing metrics.

52. The non-transitory computer-readable medium of claim 46, wherein, The code includes instructions executable by the one or more processors to cause the UE to perform the following operations: The subset of the plurality of received beams is determined at least in part based on the hardware capabilities of the UE.

53. The non-transitory computer-readable medium of claim 46, wherein, The code includes instructions executable by the one or more processors to cause the UE to perform the following operations: During the first subset of the scheduled synchronization signal transmission time set, the plurality of receive beams are used at the UE to measure one or more second transmit beams; as well as The plurality of transmit beams are selected at the UE based at least in part on measurements of the plurality of transmit beams and the one or more second transmit beams using the plurality of receive beams during a first subset of the scheduled set of synchronization signal transmission times.

54. The non-transitory computer-readable medium of claim 46, wherein, The periodic search and measurement periods are associated with sixteen synchronization signal transmission times.

55. The non-transitory computer-readable medium of claim 46, wherein, During the periodic search and measurement period, the first scheduled synchronization signal transmission time of the first subset of the scheduled synchronization signal transmission time set and the second scheduled synchronization signal transmission time of the first subset of the scheduled synchronization signal transmission time set are separated by one or more scheduled synchronization signal transmission times of the second subset of the scheduled synchronization signal transmission time set.

56. The non-transitory computer-readable medium of claim 46, wherein, Each scheduled synchronization signal transmission time in the set of scheduled synchronization signal transmission times is associated with a respective set of synchronization signal bursts that includes multiple synchronization signal blocks.

57. The non-transitory computer-readable medium of claim 56, wherein, Each of the plurality of synchronization signal blocks corresponds to a respective transmission beam among the plurality of transmission beams.

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